Recording apparatus and drying method for recording apparatus

Abstract

A recording apparatus includes a recording portion, a first air blowing portion comprising a plurality of first nozzle holes, a second air blowing portion comprising a plurality of second nozzle holes, and provided to be adjacent to the first air blowing portion on a downstream side in a conveyance direction, and a control portion configured to control the first air blowing portion and the second air blowing portion such that a first air velocity in the plurality of first nozzle holes is lower than a second air velocity in the plurality of second nozzle holes, and a ratio of a first total air amount, which is a total air amount per unit time blown from the plurality of first nozzle holes, and a second total air amount, which is a total air amount per unit time blown from the plurality of second nozzle holes, is within a predetermined range.

What is claimed is: 
     
         1 . A recording apparatus comprising:
 a recording portion configured to apply a liquid composition to a recording medium and record an image;   a first air blowing portion having a plurality of first nozzle holes of which total cross-sectional area is a first total cross-sectional area, and configured to blow air toward the recording medium through the plurality of first nozzle holes;   a second air blowing portion having a plurality of second nozzle holes of which total cross-sectional area is a second total cross-sectional area smaller than the first total cross-sectional area, and configured to blow air toward the recording medium through the plurality of second nozzle holes, and moreover provided within a same space as the first air blowing portion so as to be adjacent to the first air blowing portion on a downstream side in a conveyance direction of the recording medium; and   a control portion configured to control the first air blowing portion and the second air blowing portion such that a first air velocity in the plurality of first nozzle holes of the first air blowing portion is lower than a second air velocity in the plurality of second nozzle holes of the second air blowing portion, and a ratio of a first total air amount, which is a total air amount per unit time blown from the plurality of first nozzle holes, and a second total air amount, which is a total air amount per unit time blown from the plurality of second nozzle holes, is within a predetermined range.   
     
     
         2 . The recording apparatus according to  claim 1 ,
 wherein 1.2DH≤DL≤3.0DH is satisfied, where DL is the first total cross-sectional area and DH is the second total cross-sectional area, and   wherein the control portion controls the first air blowing portion and the second air blowing portion so as to satisfy 1.2VL≤ VH≤3.0VL and FH:FL=2:3 to 3:2, where VL is the first air velocity, VH is the second air velocity, FL is the first total air amount, and FH is the second total air amount.   
     
     
         3 . The recording apparatus according to  claim 2 ,
 wherein the control portion controls the first air blowing portion and the second air blowing portion such that FH:FL=1:1 is satisfied.   
     
     
         4 . The recording apparatus according to  claim 2 ,
 wherein a first nozzle hole diameter of the plurality of first nozzle holes is larger than a second nozzle hole diameter of the plurality of second nozzle holes.   
     
     
         5 . The recording apparatus according to  claim 4 ,
 wherein RH<RL≤2.4RH is satisfied, where RL is the first nozzle hole diameter and RH is the second nozzle hole diameter.   
     
     
         6 . The recording apparatus according to  claim 5 ,
 wherein 0.8NH≤NL≤1.2NH is satisfied, where NL is a number of first nozzle holes provided in the first air blowing portion, and NH is a number of second nozzle holes provided in the second air blowing portion.   
     
     
         7 . The recording apparatus according to  claim 2 ,
 wherein a nozzle hole diameter of the plurality of first nozzle holes is 2.0 mm or less, and   wherein NH<NL≤4.5NH is satisfied, where NL is a number of first nozzle holes provided in the first air blowing portion, and NH is a number of second nozzle holes provided in the second air blowing portion.   
     
     
         8 . The recording apparatus according to  claim 1 ,
 wherein the first air blowing portion is a first airflow duct provided with the plurality of first nozzle holes, and the second air blowing portion is a second airflow duct provided with the plurality of second nozzle holes, and   wherein a distance in the conveyance direction between an outer covering of the first airflow duct and an outer covering of the second airflow duct is 50 mm or less.   
     
     
         9 . The recording apparatus according to  claim 1 ,
 wherein the first air blowing portion is a first airflow duct having an air blowing surface in which the plurality of first nozzle holes are provided, and the second air blowing portion is a second airflow duct having an air blowing surface in which the plurality of second nozzle holes are provided, and   wherein a distance between the air blowing surface of the first airflow duct and the recording medium and a distance between the air blowing surface of the second airflow duct and the recording medium are 30 mm or less.   
     
     
         10 . The recording apparatus according to  claim 1 ,
 wherein X=RL×A, and the A satisfies 0.8≤A≤1.3, where RL is a first nozzle hole diameter of the plurality of first nozzle holes, and X is a pitch of the plurality of first nozzle holes of the first air blowing portion in a width direction orthogonal to the conveyance direction.   
     
     
         11 . The recording apparatus according to  claim 10 ,
 wherein a disposition spacing of the plurality of second nozzle holes in the conveyance direction and a disposition spacing of the plurality of second nozzle holes in the width direction are constant.   
     
     
         12 . The recording apparatus according to  claim 1 , further comprising:
 an air circulation portion configured to collect air of a space in which the first air blowing portion and the second air blowing portion are provided, and supply the air toward the first air blowing portion and the second air blowing portion.   
     
     
         13 . The recording apparatus according to  claim 12 ,
 wherein the air circulation portion includes a heater configured to heat the air to be supplied to the first air blowing portion and a heater configured to heat the air to be supplied to the second air blowing portion.   
     
     
         14 . A drying method for a recording apparatus that blows air toward a recording medium with the recording apparatus and dries the recording medium, the recording apparatus including a recording portion configured to apply a liquid composition to the recording medium and record an image, a first air blowing portion having a plurality of first nozzle holes of which total cross-sectional area is a first total cross-sectional area and configured to blow air toward the recording medium through the plurality of first nozzle holes, and a second air blowing portion having a plurality of second nozzle holes of which total cross-sectional area is a second total cross-sectional area smaller than the first total cross-sectional area, and configured to blow air toward the recording medium through the plurality of second nozzle holes and moreover provided within a same space as the first air blowing portion so as to be adjacent to the first air blowing portion on a downstream side in a conveyance direction of the recording medium, the method comprising:
 blowing air toward the recording medium from the first air blowing portion and the second air blowing portion such that a first air velocity in the plurality of first nozzle holes of the first air blowing portion is lower than a second air velocity in the plurality of second nozzle holes of the second air blowing portion, and a ratio of a first total air amount, which is a total air amount per unit time blown from the plurality of first nozzle holes, and a second total air amount, which is a total air amount per unit time blown from the plurality of second nozzle holes, is within a predetermined range.   
     
     
         15 . The drying method for a recording apparatus according to  claim 14 ,
 wherein 1.2DH≤DL≤3.0DH is satisfied, where DL is the first total cross-sectional area and DH is the second total cross-sectional area, and   wherein the method includes blowing air toward the recording medium from the first air blowing portion and the second air blowing portion so as to satisfy 1.2VL≤VH≤3.0VL and FH:FL=2:3 to 3:2, where VL is the first air velocity, VH is the second air velocity, FL is the first total air amount, and FH the second total air amount.